THE MUST reads
If confirmed, scientists may have easier access to sample the moon's hidden ocean.
Hubble has been searching for further evidence of water plumes shooting off the moon's surface.
Europa and speculation of aliens go hand-in-hand, but NASA is keen to point out that Monday's icy moon announcement won't include the "a" word.
As Juno gets up-close and personal with Jupiter's north pole, what have we learned about the poles of the planets and moons?
NASA's Juno spacecraft captured stunning images of Jupiter's north pole.